On-Vehicle Inspection

INSPECT AUTOMATIC LIGHT CONTROL SENSOR

Measure the continuity, waveform and voltage according to the value(s) in the table below.

NOTE: With connector connected, perform inspection from the backside of the connector.

Fig 1: Identifying Automatic Light Control Sensor Connector Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Standard voltage

AUTOMATIC LIGHT CONTROL SENSOR VOLTAGE SPECIFICATION

Tester connection	Condition	Specified condition
6 - 3	Always	10 to 14 V
5 - 3	Ignition switch on (IG), Headlight dimmer SW in AUTO	Pulse generation (See bwaveform 1)

Standard resistance

AUTOMATIC LIGHT CONTROL SENSOR RESISTANCE SPECIFICATION

Tester connection	Condition	Specified condition
3 - Body ground	Always	Below 1 Ω

Waveform 1

WAVEFORM 1 REFERENCE

Item	Description
Terminal	CLTS (5) - CLTE (3)
Gauge	5 V/DIV, 5 ms/DIV
Condition	Ignition switch ON (IG), Headlight dimmer SW in AUTO

HINT:

If the ambient light becomes brighter, width A will become narrower.

Fig 2: Identifying Waveform 1 Graph